Among the interested teams: The New York Yankees, Pittsburgh Pirates and Tampa Bay Rays, all of which are looking to add offense as the second half begins.

The Justin Morneau era in Minnesota could be coming to an end. (AP Photo)

Morneau was once one of the game's brightest young stars, winning the AL MVP in 2006 and finishing second in voting in 2008. He was an All-Star every year from 2007 to 2010 and helped lead the Twins to a series of AL Central titles.

But injuries have limited his playing time and productivity since 2008, the last season in which he played more than 135 games. He has been healthy this season, but his power numbers are down from the period in which he was good for 30 home runs a season. He has seven homers.

The 32-year-old Morneau is in the last year of a six-year deal he penned before the 2008 season, and the Twins are in the midst of their fourth straight losing season, so trading him for prospects would make sense.

The Yankees have lost first baseman Mark Teixeira for the season, and the team's offense has been anemic. Despite that, they are still only a few games out of a playoff spot as the second half opens. The team has put pitchers Phil Hughes and Joba Chamberlain on the block, but it's not likely the Twins would have any interest in those two. The Yankees also are making catching prospect JR Murphy available.

Pittsburgh and Tampa Bay lead the wild card races in their respective leagues.